Alexander Tsarev
Mushroom industry

Русский Arabic

Subscribe to A. Tsarev articles

Black compost

Pythium oligandrum, Pythium hydnosporum

Before applying the casing layer, many mushroom growers have seen areas of compost, black in color and of various sizes and shapes that have not grown with mycelium.

Laboratory researches of this compost have shown that it has been colonized with different kinds of Pythium mold.


Black spots – the areas of compost which have not grown with mycelium


Black spots – the areas of compost which have not grown with mycelium
It was discovered, that problems occur when the spores of this fungus get into the compost either before spawning, or during spawning along with mushroom mycelium.

This mold, which is transferred through soil, can infect straw in the process of grain-crop cultivation or at storing bundles of straw on the ground.

A high content of nitrogen was discovered in areas of compost infected with the black mold. Scientists consider that this happens due to uneven distribution of nitrogen supplements in the compost. But it’s not clear yet whether the areas with a high content of nitrogen restrain the mycelium growth or stimulate Pythium growth.

The other factor that is favorable for the development of this mold is an excessive humidity of the compost.

The following conclusion can be made from the above said: in order to escape the appearance and spreading of the Pythium mold, it is necessary to:
  • Avoid the infection of straw through the soil. Bundles of straw have to be stored on a concrete platform;
  • Observe the rules of hygiene at unloading pasteurized compost and at spawning;
  • Apply and distribute the nitrogen supplements in the compost as uniformly as possible;
  • Maintain a corresponding compost humidity.

Comments

amir ommati:

thx a lot for your best answer to my mr tsarev.
1-for your first qustion i saw mycogone in day 13...

Царев Александр Владимирович:

Dear Amir Ommati!
On which day after the application of peat to compost, the first signs of a mikogon...

Царев Александр Владимирович:

Dear Fouzi
You will be contacted by my partner. He is an Arab and you will be comfortable with him...

watering first flush mushrooms

linda:

sir pliz tell me about the irrigation requirements of the mushroom cultivated in plastic bags with straw...

Царев Александр Владимирович:

Dear Emmanuel Chimanga!
I'm sorry that I could not immediately answer you. The usual depth of...

Царев Александр Владимирович:

Dear Fouad Dagher
Tunnels of 2 phases (pasteurization) of compost are made at the location of the...

Царев Александр Владимирович:

Dear Ali Karim!
I apologize for not being able to answer you right away.
Please send more information...

Царев Александр Владимирович:

Dear Hai Nguyen!
The usual depth of the cover layer is 4-6 cm. Weight is 26-30 kg per 1 m2. It depends...

Царев Александр Владимирович:

Dear Shahar!
I do not use formalin for a long time. The best way to disinfect the growth chambers...

Царев Александр Владимирович:

Dear Tejpal!
These mites usually live in the feathers of chickens. If there was a lot of cold compost...

© 2003–2017 Alexander Tsarev
Authorization

Designed by Volin&Petrova - создание сайтов и хостинг.